US20170021347A1 - Pipette device - Google Patents
Pipette device Download PDFInfo
- Publication number
- US20170021347A1 US20170021347A1 US15/300,731 US201515300731A US2017021347A1 US 20170021347 A1 US20170021347 A1 US 20170021347A1 US 201515300731 A US201515300731 A US 201515300731A US 2017021347 A1 US2017021347 A1 US 2017021347A1
- Authority
- US
- United States
- Prior art keywords
- fixing member
- container
- pipette device
- pumping
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0241—Drop counters; Drop formers
- B01L3/0272—Dropper bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0282—Burettes; Pipettes mounted within a receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5029—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures using swabs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/025—Align devices or objects to ensure defined positions relative to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/14—Process control and prevention of errors
- B01L2200/141—Preventing contamination, tampering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/04—Closures and closing means
- B01L2300/041—Connecting closures to device or container
- B01L2300/042—Caps; Plugs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/04—Closures and closing means
- B01L2300/041—Connecting closures to device or container
- B01L2300/043—Hinged closures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/04—Closures and closing means
- B01L2300/046—Function or devices integrated in the closure
- B01L2300/047—Additional chamber, reservoir
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0848—Specific forms of parts of containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L2300/161—Control and use of surface tension forces, e.g. hydrophobic, hydrophilic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0457—Moving fluids with specific forces or mechanical means specific forces passive flow or gravitation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0481—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure squeezing of channels or chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
Definitions
- the present invention relates to a pipette device.
- a sampler including a collecting member made of cotton and the like may be used.
- the sample collected by the collecting member may be mixed with a diluted solution stored in the sampler chamber.
- the diluted solution mixed with the sample should be discharged to the outside of the sampler chamber.
- a micropipette and the like may be used.
- a sampler may have a scale displayed in a chamber thereof, and may be deformable so that the sampler itself may be used as a pipette (see U.S. Pat. No. 7,300,632 (Date of Grant: Nov. 27, 2007)).
- Micropipettes in the related art need to be provided separately from a sampler, and are inconvenient to prepare, use, and maintain.
- a relative height of a scale and a liquid may be changed according to a position from which a user views the scale.
- the user should adjust an amount of a liquid to be discharged by adjusting a degree of pressing the sampler chamber while viewing the scale.
- a pipette device including a container having a predetermined space therein, of which a nozzle is formed at one end thereof and the other end is opened; a first fixing member whose one end is detachably coupled to the other end of the container; a second fixing member coupled to the other end of the first fixing member; and a pumping member that is inserted into the second fixing member such that an opened end portion faces the other end of the container, delivers interior air into the container by changing in shape when it is pressed, and presses an internal space of the container, wherein the opened end portion of the pumping member is fixed between the first fixing member and the second fixing member by coupling the first fixing member to the second fixing member.
- Embodiments of the present invention may provide a pipette device capable of discharging an accurate amount of liquid with simple manipulation.
- FIG. 1 is a perspective view illustrating a pipette device according to an embodiment of the present invention
- FIG. 2 is a side cross-sectional view illustrating the pipette device in FIG. 1 ;
- FIG. 3 is an exploded perspective view illustrating components included in the pipette device in FIG. 1 ;
- FIG. 4 is a perspective view illustrating an operation of the pipette device in FIG. 1 ;
- FIG. 5 shows a side view and a partially enlarged view of a container in FIG. 3 ;
- FIGS. 6A and 6B are a side cross-sectional view and a plan view of a first fixing member in FIG. 3 , respectively;
- FIGS. 7A and 7B are a plan view illustrating a second fixing member in FIG. 3 and a perspective view illustrating a bottom surface of the second fixing member;
- FIG. 8 is a side cross-sectional view illustrating a pumping member in FIG. 3 ;
- FIGS. 9A and 9B are a side view illustrating a pressing plate in FIG. 3 and a perspective view illustrating a bottom surface of the pressing plate;
- FIG. 10 is a diagram illustrating an enlarged area A in the cross-sectional view in FIG. 2 ;
- FIG. 11 is a diagram illustrating an enlarged area A in the cross-sectional view in FIG. 2 when the pipette device in FIG. 1 is operated;
- FIG. 12 is a diagram illustrating a state in which a stick member and a collecting tip included in the pipette device in FIG. 1 are maintained.
- FIG. 13A is a diagram illustrating another embodiment of the collecting tip included in the pipette device of the present invention.
- FIG. 13B is a diagram schematically illustrating a state in which the collecting tip in FIG. 13A is manufactured.
- FIG. 1 is a perspective view illustrating a pipette device 10 according to an embodiment of the present invention.
- FIG. 2 is a side cross-sectional view illustrating the pipette device 10 in FIG. 1 .
- FIG. 3 is an exploded perspective view illustrating components included in the pipette device 10 in FIG. 1 .
- FIG. 4 is a perspective view illustrating an operation of the pipette device 10 in FIG. 1 .
- the pipette device 10 may include a container 100 having a predetermined space therein, of which a nozzle 110 is formed at one end thereof, and the other end is opened, a first fixing member 200 whose one end is detachably coupled to the other end of the container 100 , a second fixing member 300 coupled to the other end of the first fixing member 200 , and a pumping member 400 that is inserted into the second fixing member 300 such that an opened end portion faces the other end of the container 100 , delivers interior air into the container 100 by changing in shape when it is pressed, and pressurizes an internal space of the container 100 .
- the opened end portion of the pumping member 400 may be fixed between the first fixing member 200 and the second fixing member 300 when the first fixing member 200 and the second fixing member 300 are coupled.
- the container 100 may be a cylindrical member having an empty space therein.
- the container 100 may be made of a plastic, and may be transparently or semi-transparently formed.
- a liquid may be stored in the internal space of the container 100 , and the stored liquid may have a preset volume.
- the liquid stored in the container 100 may be a diluted solution.
- the nozzle 110 may be formed in one end of the container 100 , and the other end provided opposite thereto may be an opened end portion. Through the opened end portion, a liquid such as a diluted solution may be introduced into the internal space of the container 100 . Through the nozzle 110 , the liquid stored in the container 100 may be discharged to the outside. The liquid stored in the container 100 may be discharged to the outside through the nozzle 110 when the internal space of the container 100 is pressed. In the present embodiment, when the pumping member 400 is pressed and a shape thereof changes, the internal space of the container 100 may be pressed according to delivery of the interior air into the container 100 . When the internal space of the container 100 is pressed, the liquid inside the container 100 may be discharged through the nozzle 110 .
- a thread 120 may be formed along an outer circumferential surface. As will be described below, the thread 120 may be used to couple the container 100 and the first fixing member 200 .
- the first fixing member 200 may be detachably coupled to the opened end portion of the container 100 .
- a thread 290 may be formed in an inside surface of the first fixing member 200 .
- the first fixing member 200 may be coupled to the opened end portion of the container 100 by a thread.
- a user may rotate the first fixing member 200 in one direction to couple the first fixing member 200 and the container 100 , and rotate the first fixing member 200 in a reverse direction to separate the first fixing member 200 from the container 100 .
- the first fixing member 200 may be a cylindrical member that includes a partition wall 220 dividing an inside into an upper portion and a lower portion and at least one fluid passage that is formed by passing through the partition wall 220 .
- the upper portion may be coupled to the second fixing member 300
- the lower portion may be coupled to the container 100 .
- the partition wall 220 may support a lower end of the pumping member 400 and fix a position thereof.
- the fluid passage may provide a path along which a fluid flows between the container 100 and the pumping member 400 .
- one side of the fluid passage may communicate with the internal space of the container 100 , and the other side thereof may communicate with an internal space of the pumping member 400 .
- air therein may be delivered into the container 100 through the fluid passage.
- a collecting tip 620 is formed at an end portion of the first fixing member 200 .
- a stick member 610 accommodated inside the container 100 may be fixed.
- the stick member 610 may be a bar-shaped member made of a polymer resin.
- the stick member 610 may be inserted into, and fixed to a stick fixing portion 250 of the first fixing member 200 .
- an adhesive is applied between the stick member 610 and the stick fixing portion 250 , and the stick member 610 may be adhered to the stick fixing portion 250 .
- the stick member 610 is inserted into the stick fixing portion 250 , when at least one of the stick member 610 and the stick fixing portion 250 is heated, or heat treatment is performed thereon, the stick member 610 may be adhered to the stick fixing portion 250 .
- the collecting tip 620 may be formed at an end portion of the stick member 610 .
- the collecting tip 620 may be made of a polyurethane, but a material of the collecting tip 620 is not limited thereto.
- the collecting tip 620 may also be made of another material such as cotton coated with a polymer resin.
- the second fixing member 300 may be a cylindrical member having a through-hole 310 (see FIG. 7A ) formed therein and a predetermined length, and may be coupled to the first fixing member 200 at an end portion opposite to an end portion in which the first fixing member 200 is coupled to the container 100 .
- a part of a side surface of the second fixing member 300 may be formed at an opened shape.
- the pumping member 400 may be inserted into the through-hole 310 of the second fixing member 300 .
- the pumping member 400 may be an elastic member that has an opened end portion in one side and an empty space capable of accommodating air therein.
- An elastic material of the pumping member 400 may be silicone or rubber, but the material is not limited thereto. According to elasticity of the pumping member 400 , the pumping member 400 has a shape that changes when pressed, and that may be restored when the pressing operation is completed.
- the pumping member 400 may be inserted into the second fixing member 300 such that the opened end portion thereof faces the opened end portion of the container 100 . While the pumping member 400 is inserted into the second fixing member 300 , the second fixing member 300 may be coupled to the first fixing member 200 . In this case, the opened end portion of the pumping member 400 is positioned between the first fixing member 200 and the second fixing member 300 , and may be fixed between the first fixing member 200 and the second fixing member 300 when the first fixing member 200 and the second fixing member 300 are coupled.
- the internal space of the pumping member 400 and the internal space of the container 100 may communicate with each other.
- the pumping member 400 is pressed, a shape thereof changes, and interior air is pushed. In this case, the pushed air may be introduced into the internal space of the container 100 .
- An inside of the container 100 may be pressed by air introduced into the container 100 from the pumping member 400 . As the inside of the container 100 is pressed, the liquid stored inside the container 100 may be discharged through the nozzle 110 .
- a position of the pumping member 400 serving as a pressing portion may be firmly fixed in the pipette device 10 . Since the position of the pumping member 400 is fixed in the pipette device 10 , even when the pumping member 400 is pressed, the position of the pumping member 400 is not changed, and only a shape thereof may change. In addition, when the pumping member 400 is pressed, since a lower end portion of the pumping member 400 is not pushed downward, a degree of a change in the shape of the pumping member 400 , when the pumping member 400 is pressed once, may be maintained at a constant level. As a result, when the pumping member 400 is pressed once, a volume of air delivered from the pumping member 400 into the container 100 may be maintained at a constant level.
- a pressure at a constant level may be applied into the container 100 whenever the pumping member 400 is pressed.
- a liquid is stored inside the container 100
- a volume of a liquid discharged through the nozzle 110 is proportional to the level of the pressure applied into the container 100 .
- a liquid of a constant volume may be discharged to the outside of the container 100 through the nozzle 110 whenever the pumping member 400 is pressed. Therefore, without a separate scale, the user may discharge a liquid of a constant volume from the pipette device 10 by only pressing the pumping member 400 .
- a volume of a liquid discharged through the nozzle 110 may have a preset value.
- the preset value may be, for example, 1 mL.
- the pumping member 400 may be designed to have a size and a shape such that a liquid of the predetermined volume may be discharged when the pumping member 400 is pressed.
- the position of the pumping member 400 may be maintained without change even if the pressure of outside air decreases.
- This effect is particularly useful when the pipette device 10 is transported by airplane.
- the pipette device 10 of the present embodiment is transported by airplane, there is no leakage. As a result, it can be easily exported to other countries.
- the pipette device 10 may further include a pressing plate 500 that is inserted between the second fixing member 300 and the pumping member 400 , and is mounted on an upper surface of the pumping member 400 .
- the pressing plate 500 may be a flat plate member having a shape corresponding to a cross section of the second fixing member 300 . Since the pressing plate 500 is provided on the upper surface of the pumping member 400 , the user may press the pumping member 400 by pressing the pressing plate 500 .
- the pumping member 400 is made of an elastic material. If there is a portion on which a pressure is particularly concentrated when the pumping member 400 is pressed, further deformation occurs in that portion. If the portion on which a pressure is concentrated is changed whenever the pumping member 400 is pressed, a shape into which the pumping member 400 changes may be different every time. In this case, as a result, an amount of a liquid discharged from the nozzle 110 may change every time.
- the pressing plate 500 may uniformly deliver a pressure to the upper surface of the pumping member 400 . As a result, whenever the pumping member 400 is pressed, a shape into which the pumping member 400 changes may remain the same. As a result, whenever the pumping member 400 is pressed, an amount of a liquid discharged from the nozzle 110 may be further constantly maintained without error.
- FIG. 5 shows a side view illustrating the container 100 in FIG. 3 and a partially enlarged view illustrating an enlarged lower portion of the container 100 .
- the pipette device 10 may further include a cap 700 capable of opening and closing the nozzle 110 .
- the cap 700 may be connected to an end portion in which the nozzle 110 of the container 100 is formed.
- the cap 700 may be connected to one end of the container 100 .
- a step portion may be formed along a circumference thereof.
- the nozzle 110 may be closed.
- a portion connecting the cap 700 and the container 100 may be bent.
- the connecting portion may be bent to open the nozzle 110 .
- the cap 700 may include an insertion protrusion 710 that protrudes from an inside surface.
- the insertion protrusion 710 may be inserted into the nozzle 110 .
- the nozzle 110 may be firmly closed when the cap 700 is coupled.
- an extending portion 112 that extends upwardly from an upper end of the nozzle 110 of the container 100 may be formed inside the container 100 .
- the extending portion 112 may have a shape in which the nozzle 110 extends to the container 100 having a predetermined length. That is, the extending portion 112 may be formed in a cylindrical shape in which a hole is formed at the center. The hole may communicate with the nozzle 110 . A diameter of the hole may be the same as an inner diameter of the nozzle 110 .
- the liquid stored inside the container 100 should pass through an upper end of the extending portion 112 to be introduced into the nozzle 110 .
- the extending portion 112 having a circular cross section protrudes from a lower end surface of the container 100 , only an area corresponding to a circular upper end surface of the extending portion 112 comes in contact with the liquid at an upper portion of the nozzle 110 .
- a phenomenon in which the liquid is introduced into the nozzle 110 when the inside of the container 100 is not pressed may be minimized. That is, by forming the extending portion 112 , even when a pressure is not applied into the container 100 , it is possible to prevent the liquid stored in the container 100 from leaking through the nozzle 110 .
- an inner circumferential surface of the extending portion 112 may include a plurality of uneven portions 114 .
- the inner circumferential surface of the extending portion 112 may have a predetermined surface roughness.
- the surface roughness may have a predetermined value.
- the predetermined surface roughness value may be a value at which hydrophobicity of the inner circumferential surface of the extending portion 112 increases.
- the predetermined surface roughness value may be changed by a material forming the extending portion 112 or a type of a liquid to be stored inside the container 100 .
- the predetermined surface roughness value may be determined by an experiment.
- the plurality of uneven portions 114 may have a uniform shape or a constant size, but the present invention is not limited thereto.
- the extending portion 112 may be formed at the same time when the nozzle 110 is formed.
- a mold in which an uneven portion is formed in a surface may be used when the extending portion 112 is formed.
- the mold may have a predetermined surface roughness, due to the uneven portion formed in the surface of the mold.
- the extending portion 112 may be formed to have an inner circumferential surface that has the same surface roughness as the mold or a similar surface roughness to the mold.
- the extending portion 112 may be modified to have a hydrophobic inner surface.
- an attractive force acting between an inside of the extending portion 112 and the liquid stored in the container 100 may be further decreased. As a result, it is possible to prevent the liquid stored in the container 100 from leaking through the nozzle 110 when no pressure is applied into the container 100 .
- FIG. 6A is a side cross-sectional view illustrating the first fixing member 200 in FIG. 3 .
- FIG. 6B is a plan view of the first fixing member 200 when viewed from the top.
- the first fixing member 200 may include a cylindrical body 210 , the partition wall 220 that protrudes inward from an inner circumferential surface of the body 210 and divides an inside of the body 210 into an upper portion and a lower portion, and a communication hole 230 that passes through the partition wall 220 .
- a first support 2201 that protrudes upwardly along a circumference of the communication hole 230 and a second support 2202 that has an outer diameter, which is smaller than that of the first support 2201 , and protrudes upwardly from an upper surface of the first support 2201 along the circumference of the communication hole 230 may be formed.
- the outer diameter of the first support 2201 is greater than an inner diameter of the pumping member 400
- an outer diameter of the second support 2202 may be smaller than or the same as the inner diameter of the pumping member 400 .
- the opened end portion of the pumping member 400 may be mounted on the upper surface of the first support 2201 .
- the first support 2201 supports the opened end portion of the pumping member 400 from below.
- the pumping member 400 is pressed, the opened end portion of the pumping member 400 is caught by the first support 2201 , and downward movement is restricted.
- a position of the opened end portion of the pumping member 400 may be fixed between the first fixing member 200 and the second fixing member 300 .
- the second support 2202 may be inserted into the pumping member 400 , and may firmly support a lower portion of the pumping member 400 from thereinside.
- the upper surface of the first support 2201 may be formed on a curved surface that is convex and faces upwardly.
- the pumping member 400 When the pumping member 400 is pressed, the pumping member 400 is vertically compressed, and a lower end portion of the pumping member 400 may be pushed outwardly.
- the upper surface of the first support 2201 is formed on the curved surface that is convex and faces upwardly, it is possible to prevent the lower end portion of the pumping member 400 from being pushed outwardly.
- the outward movement of the lower end portion of the pumping member 400 may be restricted by bending of the first support 2201 . That is, the end portion of the pumping member 400 is caught by bending of the upper surface of the first support 2201 , and may not be pushed outwardly.
- the communication hole 230 may serve as a fluid passage connecting an inside of the container 100 and an inside of the pumping member 400 .
- the stick fixing portion 250 into which the stick member 610 may be inserted and fixed may be provided inside the communication hole 230 .
- the stick fixing portion 250 may be connected to the circumferential surface of the communication hole 230 by a plurality of ribs 240 such that the communication hole 230 may still serve as the fluid passage.
- a circular third support 2203 that protrudes downwardly from the outside of the communication hole 230 and a circular fourth support 2204 that protrudes downwardly from the outside of the third support 2203 may be formed.
- the third support 2203 and the fourth support 2204 may be formed to be spaced from each other.
- a protrusion height of the fourth support 2204 may be greater than that of the third support 2203 .
- an outer diameter of the third support 2203 may be smaller than or the same as an inner diameter of the container 100 .
- An inner diameter of the fourth support 2204 may be greater than that of the container 100 , and may be smaller than an outer diameter of the container 100 .
- the third support 2203 of the first fixing member 200 is inserted into the container 100 through the opened end portion of the container 100 .
- the fourth support 2204 may come in contact with a surface of the end portion of the container 100 .
- first fastening grooves 260 a that extend to a longitudinal direction of the body 210 and are disposed to be spaced from each other and a second fastening groove 260 b that extends along a circumference of the body 210 may be formed.
- the second fastening groove 260 b may be perpendicular to each of the first fastening grooves 260 a .
- a first fastening protrusion 360 a and a second fastening protrusion 360 b of the second fixing member 300 to be described may be inserted into the first fastening groove 260 a and the second fastening groove 260 b , respectively.
- the first fastening protrusion 360 a is inserted into the first fastening groove 260 a and the second fastening protrusion 360 b is inserted into the second fastening groove 260 b
- the first fixing member 200 and the second fixing member 300 may be coupled.
- FIG. 7A is a plan view of the second fixing member 300 in FIG. 3 when viewed from the top.
- FIG. 7B is a perspective view of the second fixing member 300 with a bottom surface facing upwardly.
- the second fixing member 300 may include a cylindrical body 320 whose side surface is partially recessed from an upper end, the through-hole 310 that is formed by passing through the body 320 and into which the pumping member 400 is inserted, and a protrusion 330 that protrudes inward from an upper end of the inner circumferential surface of the body 320 .
- the recessed portion of the body 320 may have a width at which the user's thumb can be inserted.
- the user may push his or her thumb into the second fixing member 300 through the recessed portion and press the pumping member 400 .
- the protrusion 330 may be formed on a side opposite to the recessed portion of the body 320 .
- a fastening protrusion of the pressing plate 500 to be described may be caught in the protrusion 330 . While the pressing plate 500 is mounted on the upper surface of the pumping member 400 , when the fastening protrusion of the pressing plate 500 is caught in the protrusion 330 , the pressing plate 500 may be inserted between the pumping member 400 and the second fixing member 300 .
- a plurality of first fastening protrusions 360 a that extend to a longitudinal direction of the body 320 and are disposed to be spaced from each other, and the second fastening protrusion 360 b that extends along a circumference of the body 320 may be formed.
- the second fastening protrusion 360 b may be perpendicular to each of the first fastening protrusions 360 a .
- the first fixing member 200 and the second fixing member 300 may be coupled.
- Coupling of the first fastening groove 260 a and the first fastening protrusion 360 a may restrict rotation of the second fixing member 300 .
- Coupling of the second fastening groove 260 b and the second fastening protrusion 360 b may fix a position of the second fixing member 300 in a longitudinal direction.
- the plurality of first fastening grooves 260 a may be disposed to have a constant interval therebetween.
- a plurality of first fastening protrusions 360 a may be disposed to have the same interval therebetween.
- the second fixing member 300 may be coupled to the first fixing member 200 , regardless of a direction in which the second fixing member 300 faces.
- each of the first fastening protrusions 360 a can be inserted into each of the first fastening grooves 260 a again only when the second fixing member 300 is rotated by a constant angle from that state.
- each of the first fastening protrusions 360 a can be inserted into each of the first fastening grooves 260 a only when the second fixing member 300 rotates by the constant angle or additionally rotates a multiple of the constant angle in the same direction again. Therefore, when the user couples the first fixing member 200 and the second fixing member 300 , or when the first fixing member 200 and the second fixing member 300 are coupled in a process of manufacturing the pipette device 10 , constant angular intervals may be set in a direction in which the recessed portion of the second fixing member 300 faces.
- first fixing member 200 and the second fixing member 300 are coupled using the pluralities of grooves and protrusions
- the scope of the present invention is not limited thereto.
- Various coupling structures in which the first fixing member 200 and the second fixing member 300 may be coupled by interposing the lower end portion of the pumping member 400 therebetween may be used.
- FIG. 8 is a side cross-sectional view illustrating the pumping member 400 in FIG. 3 .
- the pumping member 400 may include a pressing portion 430 having an empty space therein, a column portion 420 that extends to a longitudinal direction with a predetermined length from an end portion of the pressing portion 430 , and a flange portion 410 that protrudes perpendicular to the column portion 420 from an end portion of the column portion 420 along a circumference of the column portion 420 .
- the pressing portion 430 may include an upper surface that has a flat pocket shape. When the flat upper surface is pressed by the user, the shape may be changed by compression. In a lower end of the pressing portion 430 , a circular opening may be formed.
- the column portion 420 may extend along a circumference of the circular opening and protrude to a longitudinal direction with a predetermined length. In a lower end of the column portion 420 , the flange portion 410 may be formed in an outward direction.
- the first fixing member 200 and the second fixing member 300 are coupled, while the column portion 420 is inserted into the second fixing member 300 , the flange portion 410 may be inserted between the first fixing member 200 and the second fixing member 300 .
- the position of the pumping member 400 may be fixed.
- a thickness t 1 of the pressing portion 430 may be greater than a thickness t 2 of the column portion 420 .
- a relatively great change may occur in a portion whose thickness is changed, that is, in a boundary between the pressing portion 430 and the column portion 420 .
- the boundary between the pressing portion 430 and the column portion 420 may be intensively compressed, and the user may feel a clicking sensation, upon pressing the pressing portion 430 .
- FIG. 9A is a side view illustrating the pressing plate 500 in FIG. 3 .
- FIG. 9B is a perspective view of the pressing plate 500 with a bottom surface facing upwardly.
- the pressing plate 500 may include a body 520 having a flat upper surface, a circular groove 510 formed on a lower surface of the body 520 , and a fitting protrusion 530 that protrudes outwardly from an outer circumferential surface of the body 520 .
- the body 520 may have a flat upper surface and a shape corresponding to a cross section of an upper portion of the second fixing member 300 .
- a diameter of the circular groove 510 may be greater than that of the upper surface of the pumping member 400 .
- the pressing plate 500 may be mounted on the upper surface of the pumping member 400 .
- the fitting protrusion 530 may be positioned below the protrusion 330 of the second fixing member 300 .
- the fitting protrusion 530 is caught by the protrusion 330 , the upward movement of the pressing plate 500 is restricted.
- the pumping member 400 is inserted into the circular groove 510 , the downward movement and lateral movement of the pressing plate 500 may be restricted.
- FIG. 10 is a diagram illustrating an enlarged area A in the cross-sectional view in FIG. 2 .
- FIG. 11 is a diagram illustrating a state of the area A when the pumping member 400 is pressed as in FIG. 4 .
- FIG. 10 it illustrates a state in which the container 100 , the first fixing member 200 , the pumping member 400 and the second fixing member 300 are coupled.
- the first fixing member 200 and the second fixing member 300 may be coupled by interposing the lower end portion of the pumping member 400 therebetween.
- the container 100 may be coupled to the first fixing member 200 .
- the third support 2203 of the first fixing member 200 is inserted into the container 100 through the opened end portion of the container 100 .
- the fourth support 2204 may come in contact with a surface of the end portion of the container 100 .
- a predetermined empty space (S) surrounded by the third support 2203 , the fourth support 2204 and the end portion of the container 100 may be formed.
- the third support 2203 When the container 100 and the first fixing member 200 are coupled, the third support 2203 is inserted into the container 100 and accordingly a position of the container 100 may be fixed. Moreover, the third support 2203 serves as a primary barrier between the internal space of the container 100 and outside air, and the fourth support 2204 serves as a secondary barrier between the internal space of the container 100 and outside air.
- the third support 2203 primarily blocks the internal space of the container 100 from outside air and the fourth support 2204 is provided as a secondary block, a phenomenon in which a liquid stored inside the container 100 evaporates, due to temperature and humidity differences between the internal space of the container 100 and outside air, may be minimized.
- an air layer may be formed in the empty space (S) between the fourth support 2204 and the third support 2203 .
- the air layer formed in the empty space (S) serves as an insulation layer, and therefore the phenomenon in which a liquid stored inside the container 100 evaporates may be prevented even more efficiently.
- a shape of the pumping member 400 may be changed and compressed.
- an internal space of the pumping member 400 decreases, and accordingly internal air of the pumping member 400 is discharged to the outside of the pumping member 400 .
- air discharged from the pumping member 400 may pass through the communication hole 230 of the first fixing member 200 , and may be introduced into the container 100 .
- an interior pressure of the container 100 increases. Due to the increased pressure, the liquid inside the container 100 may be discharged to the outside through the nozzle 110 .
- the pressing plate 500 mounted on the upper surface of the pumping member 400 may uniformly deliver a force with which the user presses to the upper surface of the pumping member 400 .
- the lower end portion of the pumping member 400 may be changed to have a shape combined with the upper surface of the first support 2201 .
- the lower end portion of the pumping member 400 may come in close contact with the upper surface of the first support 2201 , and when the shape of the pumping member 400 is changed, internal air of the pumping member 400 may be prevented from leaking through a gap between the lower end portion of the pumping member 400 and the first support 2201 .
- the pumping member 400 when the pumping member 400 is pressed, the position of the pumping member 400 is fixed, and a force is uniformly delivered to the upper surface of the pumping member 400 by the pressing plate 500 .
- the pumping member 400 When the pumping member 400 is compressed, internal air of the pumping member 400 is prevented from leaking downward at the lower end portion of the pumping member 400 . Therefore, a volume of air delivered from the pumping member 400 into the container 100 when the pumping member 400 is pressed once may be constantly maintained. Therefore, a volume of a liquid discharged from the nozzle 110 of the container 100 when the pumping member 400 is pressed once may be constantly maintained every time.
- Table 1 an amount of a discharged liquid is recorded using the pipette device 10 in the related art in which the user should adjust an amount of a liquid to be discharged, while viewing a scale displayed in the container 100 .
- Table 2 an amount of a liquid discharged when the pumping member 400 is pressed in the pipette device 10 of the present embodiment is recorded.
- Table 1 a liquid by a scale corresponding to a volume of 1 mL is discharged once using the pipette device 10 in the related art.
- the pipette device 10 used in the experiment was designed such that a liquid corresponding to a volume of 1 mL is discharged when the pumping member 400 is pressed once.
- columns represent each experiment and rows represent a first discharge, a second discharge and a third discharge in each experiment.
- Table 1 and Table 2 are compared, it can be understood that a volume of a measured liquid in Table 2 is significantly close to 1 mL.
- an average value of volumes of discharged liquids in each experiment and an average value of volumes of discharged liquids in first to third discharges of all experiments are significantly closer to 1 mL than those in Table 1.
- standard deviations calculated in Table 2 are significantly lower than those in Table 1. This means that, when the pipette device according to the present embodiment is used, errors in which a discharged liquid is not 1 mL every time are significantly decreased. That is, as shown in the experiment results, when the pipette device according to the present embodiment is used, it can be understood that an accurate amount of liquid may be uniformly discharged.
- the pumping member 400 when the first support 2201 is formed in a curved surface that is convex and faces upwardly and the pumping member 400 is compressed, if the lower end portion of the pumping member 400 is changed to have a shape combined with the upper surface of the first support 2201 , a liquid leaked outside the container 100 may be blocked between the flange portion 410 and the first support 2201 .
- FIG. 12 is a diagram illustrating a state in which the stick member 610 and the collecting tip 620 included in the pipette device 10 in FIG. 1 are maintained.
- the center of gravity of a structure in which the collecting tip 620 , the stick member 610 , the first fixing member 200 and the second fixing member 300 are coupled may be positioned on the first fixing member 200 or the second fixing member 300 .
- the collecting tip 620 since the center of gravity is positioned on the first fixing member 200 or the second fixing member 300 , the collecting tip 620 may not come in contact with a floor surface when the collecting tip 620 is maintained as in FIG. 12 . Since the collecting tip 620 may be maintained out of contact with the floor surface, it is possible to prevent the collecting tip 620 from being contaminated, and is also possible to improve reliability of sample collection.
- FIG. 13A is a diagram illustrating another embodiment of the collecting tip included in the pipette device 10 of the present invention.
- FIG. 13B is a diagram schematically illustrating a state in which a collecting tip 620 a in FIG. 13A is manufactured.
- the collecting tip 620 a may be made of a polyurethane foam having a predetermined pore size.
- the collecting tip 620 a may be made of a polyurethane foam sheet PS.
- the collecting tip 620 a may be formed in a shape in which the polyurethane foam sheet PS is bent by interposing the stick member 610 therebetween, and then edges of the polyurethane foam sheet PS overlapping at both sides of the stick member 610 are bonded.
- the edge of the collecting tip 620 a may be formed in a straight line or a curved line.
- the pore size of the polyurethane foam sheet PS may be from 60 pores per inch (ppi) or more to 100 ppi or less.
- sample collecting performance may be improved. Specifically, since the polyurethane foam sheet PS having the pore size of said range is denser than common cotton, a phenomenon in which a sample attached to the collecting tip 620 a is absorbed into the collecting tip 620 a may be minimized. As a result, the sample attached to the collecting tip 620 a may be separated from the collecting tip 620 a more easily, and recovery efficiency of the sample may be improved.
- the polyurethane foam sheet PS having the preset pore size may be manufactured.
- the polyurethane foam sheet PS may be bent by interposing the stick member 610 therebetween. While the polyurethane foam sheet PS is folded in half, the polyurethane foam sheet PS that overlaps at both sides of the stick member 610 may be bonded along a line (L) of a predetermined shape.
- the polyurethane foam sheet PS may be bonded by heat treatment. After the doubled polyurethane foam sheet PS is bonded, the polyurethane foam sheet PS is cut and a shape of the collecting tip 620 a may be formed. In addition, an end portion of the polyurethane foam sheet PS and the stick member 610 may be bonded.
- the polyurethane sheet (PS) and the stick member 610 may be bonded by heat treatment.
- the overlapped polyurethane foam sheet PS is bonded at both sides of the stick member 610 , and the end portion of the polyurethane foam sheet PS may be bonded to the stick member 610 at the same time.
- the line (L) at which the overlapped polyurethane foam sheet PS is bonded may be the same as a boundary shape of the collecting tip 620 a.
- the polyurethane foam sheet PS may be cut along the line (L) at which the PS is bonded and form a shape of the collecting tip 620 a.
- Item 1 is a pipette device, including: a container having a predetermined space therein, in one end of which a nozzle is formed and the other end of which is opened; a first fixing member whose one end is detachably coupled to the other end of the container; a second fixing member coupled to the other end of the first fixing member; and a pumping member that is inserted into the second fixing member such that an opened end portion faces the other end of the container, delivers internal air into the container by changing in shape when it is pressed, and presses an internal space of the container, wherein the opened end portion of the pumping member is fixed between the first fixing member and the second fixing member by coupling of the first fixing member and the second fixing member.
- Item 2 is the pipette device of item 1, further including a cap that is connected to the one end of the container, and is able to open and close the nozzle.
- Item 3 is the pipette device of items 1 and 2, wherein the cap includes an insertion protrusion that protrudes from an inside surface, and is able to be inserted into the nozzle when the cap is closed.
- Item 4 is the pipette device of items 1 to 3, wherein the container further includes an extending portion that extends from an upper end of the nozzle into the container with a predetermined length.
- Item 5 is the pipette device of items 1 to 4, wherein an inner circumferential surface of the extending portion includes a plurality of uneven portions representing a surface roughness of a preset value.
- Item 6 is the pipette device of items 1 to 5, wherein the first fixing member includes: a cylindrical body; a partition wall that protrudes inward from an inner circumferential surface of the body and divides an inside of the body into an upper portion and a lower portion; and a communication hole that passes through the partition wall, and wherein the communication hole connects an internal space of the container and an inside of the pumping member.
- the first fixing member includes: a cylindrical body; a partition wall that protrudes inward from an inner circumferential surface of the body and divides an inside of the body into an upper portion and a lower portion; and a communication hole that passes through the partition wall, and wherein the communication hole connects an internal space of the container and an inside of the pumping member.
- Item 7 is the pipette device of items 1 to 6, wherein, in an upper surface of the partition wall, a first support that protrudes upwardly along a circumference of the communication hole and comes in contact with a lower end of the pumping member when an upper surface thereof is coupled to the first fixing member and the second fixing member, and a second support that protrudes upwardly from the upper surface of the first support along a circumference of the communication hole and is inserted into the pumping member when the first fixing member and the second fixing member are coupled, are formed, and wherein the second support has a smaller outer diameter than the first support.
- Item 8 is the pipette device of items 1 to 7, wherein the upper surface of the first support is formed in a curved surface that is convex and faces upwardly.
- Item 9 is the pipette device of items 1 to 8, wherein, in a lower surface of the partition wall, a circular third support that protrudes downwardly from the outside of the communication hole and is inserted into the container when the container and the first fixing member are coupled and a circular fourth support that protrudes downwardly from the outside of the third support and has a lower surface that comes in contact with an upper end of the container, are formed, and wherein the third support and the fourth support are spaced from each other.
- Item 10 is the pipette device of items 1 to 9, wherein, in the first fixing member, a collecting tip is formed in an end portion, and a stick member that is accommodated inside the container when the first fixing member is coupled to the container is fixed.
- Item 11 is the pipette device of items 1 to 10, wherein the first fixing member further includes: a stick fixing portion provided inside the communication hole; and a plurality of ribs that connect a circumferential surface of the communication hole and the stick fixing portion, and wherein the stick member is inserted into and fixed to the stick fixing portion.
- Item 12 is the pipette device of items 1 to 11, wherein the collecting tip is made of a polyurethane.
- Item 13 is the pipette device of items 1 to 12, wherein the collecting tip is made of a polyurethane foam sheet having a pore size of a predetermined value.
- Item 14 is the pipette device of items 1 to 13, wherein the pore size of the preset value is from 60 pores per inch (ppi) or more to 100 ppi or less.
- Item 15 is the pipette device of items 1 to 14, wherein, when the first fixing member and the second fixing member are coupled, the center of gravity of a structure in which the collecting tip, the stick member, the first fixing member and the second fixing member are coupled is positioned on the first fixing member or the second fixing member.
- Item 16 is the pipette device of items 1 to 15, wherein the second fixing member includes: a cylindrical body whose side surface is partially recessed from an upper end; a through-hole that is formed by passing through the body and into which the pumping member is inserted; and a protrusion that protrudes inward from an upper end of an inner circumferential surface of the body.
- Item 17 is the pipette device of items 1 to 16, further including a pressing plate that has a side surface from which a fitting protrusion protrudes and a lower surface having a circular groove formed thereon, wherein the pressing plate is inserted between the pumping member and the second fixing member when the fitting protrusion is positioned below the protrusion while an upper end of the pumping member is inserted into the circular groove.
- Item 18 is the pipette device of items 1 to 17, wherein the first fixing member includes a plurality of first fastening grooves that extend in a longitudinal direction and are disposed to have constant interval therebetween and a second fastening groove that extends along a circumference of an inside surface to be perpendicular to the first fastening groove, wherein the second fixing member includes a plurality of first fastening protrusions that extend in a longitudinal direction and are disposed to have the constant interval therebetween and a second fastening protrusion that extends along a circumference of an outside surface to be perpendicular to the first fastening protrusion, and wherein the first fixing member and the second fixing member are coupled when each of the first fastening protrusions is inserted into each of the first fastening grooves and the second fastening protrusion is inserted into the second fastening groove, respectively.
- Item 19 is the pipette device of items 1 to 18, wherein the pumping member is made of silicone or rubber.
- Item 20 is the pipette device of items 1 to 19, wherein the pumping member includes: a pressing portion that has an empty space therein and an upper portion that is formed to be flat; a column portion that extends to a longitudinal direction from an end portion of the pressing portion with a predetermined length; and a flange portion that protrudes perpendicular to the column portion along a circumference of the column portion from an end portion of the column portion, and wherein the pressing portion has a greater thickness than the column portion.
- Item 21 is the pipette device of items 1 to 20, further including a pressing plate that is inserted between the second fixing member and the pumping member and mounted on an upper surface of the pumping member.
Abstract
Description
- The present invention relates to a pipette device.
- In order to collect a sample such as microorganisms, a sampler including a collecting member made of cotton and the like may be used. When a sample is collected from a specific surface using the above collecting member and is input to a sampler chamber, the sample collected by the collecting member may be mixed with a diluted solution stored in the sampler chamber. In order to use the sample collected in the sampler chamber, the diluted solution mixed with the sample should be discharged to the outside of the sampler chamber. In order to accurately know a dilution ratio of the sample, or in order to use an accurate amount of sample, it is important to know accurately an amount of a liquid discharged from the sampler chamber.
- In order to discharge an accurate amount of liquid, a micropipette and the like may be used. In addition, as disclosed in U.S. Pat. No. 7,300,632, a sampler may have a scale displayed in a chamber thereof, and may be deformable so that the sampler itself may be used as a pipette (see U.S. Pat. No. 7,300,632 (Date of Grant: Nov. 27, 2007)).
- However, the above technique has the following problems.
- Micropipettes in the related art need to be provided separately from a sampler, and are inconvenient to prepare, use, and maintain. In addition, when a user views a scale displayed in a sampler chamber and discharges a liquid, a relative height of a scale and a liquid may be changed according to a position from which a user views the scale. In addition, the user should adjust an amount of a liquid to be discharged by adjusting a degree of pressing the sampler chamber while viewing the scale. As a result, according to these operations, there is a problem in which an amount of a liquid discharged from the sampler is inaccurate.
- According to an aspect of the present invention, there is provided a pipette device, including a container having a predetermined space therein, of which a nozzle is formed at one end thereof and the other end is opened; a first fixing member whose one end is detachably coupled to the other end of the container; a second fixing member coupled to the other end of the first fixing member; and a pumping member that is inserted into the second fixing member such that an opened end portion faces the other end of the container, delivers interior air into the container by changing in shape when it is pressed, and presses an internal space of the container, wherein the opened end portion of the pumping member is fixed between the first fixing member and the second fixing member by coupling the first fixing member to the second fixing member.
- Embodiments of the present invention may provide a pipette device capable of discharging an accurate amount of liquid with simple manipulation.
-
FIG. 1 is a perspective view illustrating a pipette device according to an embodiment of the present invention; -
FIG. 2 is a side cross-sectional view illustrating the pipette device inFIG. 1 ; -
FIG. 3 is an exploded perspective view illustrating components included in the pipette device inFIG. 1 ; -
FIG. 4 is a perspective view illustrating an operation of the pipette device inFIG. 1 ; -
FIG. 5 shows a side view and a partially enlarged view of a container inFIG. 3 ; -
FIGS. 6A and 6B are a side cross-sectional view and a plan view of a first fixing member inFIG. 3 , respectively; -
FIGS. 7A and 7B are a plan view illustrating a second fixing member inFIG. 3 and a perspective view illustrating a bottom surface of the second fixing member; -
FIG. 8 is a side cross-sectional view illustrating a pumping member inFIG. 3 ; -
FIGS. 9A and 9B are a side view illustrating a pressing plate inFIG. 3 and a perspective view illustrating a bottom surface of the pressing plate; -
FIG. 10 is a diagram illustrating an enlarged area A in the cross-sectional view inFIG. 2 ; -
FIG. 11 is a diagram illustrating an enlarged area A in the cross-sectional view inFIG. 2 when the pipette device inFIG. 1 is operated; -
FIG. 12 is a diagram illustrating a state in which a stick member and a collecting tip included in the pipette device inFIG. 1 are maintained. -
FIG. 13A is a diagram illustrating another embodiment of the collecting tip included in the pipette device of the present invention; and -
FIG. 13B is a diagram schematically illustrating a state in which the collecting tip inFIG. 13A is manufactured. - Hereinafter, detailed embodiments for implementing the scope and sprit of the present invention will be described in detail with reference to the accompanying drawings. For the convenience of description, it should be understood that drawings are not to scale.
-
FIG. 1 is a perspective view illustrating apipette device 10 according to an embodiment of the present invention.FIG. 2 is a side cross-sectional view illustrating thepipette device 10 inFIG. 1 . In addition,FIG. 3 is an exploded perspective view illustrating components included in thepipette device 10 inFIG. 1 .FIG. 4 is a perspective view illustrating an operation of thepipette device 10 inFIG. 1 . - Referring to
FIGS. 1 to 4 , thepipette device 10 according to the embodiment of the present invention may include acontainer 100 having a predetermined space therein, of which anozzle 110 is formed at one end thereof, and the other end is opened, afirst fixing member 200 whose one end is detachably coupled to the other end of thecontainer 100, asecond fixing member 300 coupled to the other end of thefirst fixing member 200, and apumping member 400 that is inserted into thesecond fixing member 300 such that an opened end portion faces the other end of thecontainer 100, delivers interior air into thecontainer 100 by changing in shape when it is pressed, and pressurizes an internal space of thecontainer 100. The opened end portion of thepumping member 400 may be fixed between thefirst fixing member 200 and thesecond fixing member 300 when thefirst fixing member 200 and thesecond fixing member 300 are coupled. - The
container 100 may be a cylindrical member having an empty space therein. Thecontainer 100 may be made of a plastic, and may be transparently or semi-transparently formed. A liquid may be stored in the internal space of thecontainer 100, and the stored liquid may have a preset volume. The liquid stored in thecontainer 100 may be a diluted solution. - The
nozzle 110 may be formed in one end of thecontainer 100, and the other end provided opposite thereto may be an opened end portion. Through the opened end portion, a liquid such as a diluted solution may be introduced into the internal space of thecontainer 100. Through thenozzle 110, the liquid stored in thecontainer 100 may be discharged to the outside. The liquid stored in thecontainer 100 may be discharged to the outside through thenozzle 110 when the internal space of thecontainer 100 is pressed. In the present embodiment, when thepumping member 400 is pressed and a shape thereof changes, the internal space of thecontainer 100 may be pressed according to delivery of the interior air into thecontainer 100. When the internal space of thecontainer 100 is pressed, the liquid inside thecontainer 100 may be discharged through thenozzle 110. - In the opened end portion in the opposite side of the
container 100, a thread 120 (seeFIG. 5 ) may be formed along an outer circumferential surface. As will be described below, thethread 120 may be used to couple thecontainer 100 and thefirst fixing member 200. - The
first fixing member 200 may be detachably coupled to the opened end portion of thecontainer 100. For this purpose, athread 290 may be formed in an inside surface of thefirst fixing member 200. In this case, thefirst fixing member 200 may be coupled to the opened end portion of thecontainer 100 by a thread. A user may rotate the first fixingmember 200 in one direction to couple the first fixingmember 200 and thecontainer 100, and rotate the first fixingmember 200 in a reverse direction to separate the first fixingmember 200 from thecontainer 100. - The
first fixing member 200 may be a cylindrical member that includes apartition wall 220 dividing an inside into an upper portion and a lower portion and at least one fluid passage that is formed by passing through thepartition wall 220. With respect to thepartition wall 220, the upper portion may be coupled to the second fixingmember 300, and the lower portion may be coupled to thecontainer 100. When the first fixingmember 200 and the second fixingmember 300 are coupled by interposing the pumpingmember 400 therebetween, thepartition wall 220 may support a lower end of the pumpingmember 400 and fix a position thereof. The fluid passage may provide a path along which a fluid flows between thecontainer 100 and the pumpingmember 400. For this purpose, one side of the fluid passage may communicate with the internal space of thecontainer 100, and the other side thereof may communicate with an internal space of the pumpingmember 400. When the pumpingmember 400 is pressed, air therein may be delivered into thecontainer 100 through the fluid passage. - A collecting
tip 620 is formed at an end portion of the first fixingmember 200. When the first fixingmember 200 is coupled to thecontainer 100, astick member 610 accommodated inside thecontainer 100 may be fixed. - The
stick member 610 may be a bar-shaped member made of a polymer resin. Thestick member 610 may be inserted into, and fixed to astick fixing portion 250 of the first fixingmember 200. As an example, while thestick member 610 is inserted into thestick fixing portion 250, an adhesive is applied between thestick member 610 and thestick fixing portion 250, and thestick member 610 may be adhered to thestick fixing portion 250. In addition, while thestick member 610 is inserted into thestick fixing portion 250, when at least one of thestick member 610 and thestick fixing portion 250 is heated, or heat treatment is performed thereon, thestick member 610 may be adhered to thestick fixing portion 250. - The collecting
tip 620 may be formed at an end portion of thestick member 610. The collectingtip 620 may be made of a polyurethane, but a material of the collectingtip 620 is not limited thereto. The collectingtip 620 may also be made of another material such as cotton coated with a polymer resin. - The
second fixing member 300 may be a cylindrical member having a through-hole 310 (seeFIG. 7A ) formed therein and a predetermined length, and may be coupled to the first fixingmember 200 at an end portion opposite to an end portion in which the first fixingmember 200 is coupled to thecontainer 100. A part of a side surface of the second fixingmember 300 may be formed at an opened shape. The pumpingmember 400 may be inserted into the through-hole 310 of the second fixingmember 300. - The pumping
member 400 may be an elastic member that has an opened end portion in one side and an empty space capable of accommodating air therein. An elastic material of the pumpingmember 400 may be silicone or rubber, but the material is not limited thereto. According to elasticity of the pumpingmember 400, the pumpingmember 400 has a shape that changes when pressed, and that may be restored when the pressing operation is completed. - The pumping
member 400 may be inserted into the second fixingmember 300 such that the opened end portion thereof faces the opened end portion of thecontainer 100. While the pumpingmember 400 is inserted into the second fixingmember 300, the second fixingmember 300 may be coupled to the first fixingmember 200. In this case, the opened end portion of the pumpingmember 400 is positioned between the first fixingmember 200 and the second fixingmember 300, and may be fixed between the first fixingmember 200 and the second fixingmember 300 when the first fixingmember 200 and the second fixingmember 300 are coupled. - When the opened end portion of the pumping
member 400 is disposed to face the opened end portion of thecontainer 100, the internal space of the pumpingmember 400 and the internal space of thecontainer 100 may communicate with each other. When the pumpingmember 400 is pressed, a shape thereof changes, and interior air is pushed. In this case, the pushed air may be introduced into the internal space of thecontainer 100. An inside of thecontainer 100 may be pressed by air introduced into thecontainer 100 from the pumpingmember 400. As the inside of thecontainer 100 is pressed, the liquid stored inside thecontainer 100 may be discharged through thenozzle 110. - In addition, since the opened end portion of the pumping
member 400 is fixed between the first fixingmember 200 and the second fixingmember 300, a position of the pumpingmember 400 serving as a pressing portion may be firmly fixed in thepipette device 10. Since the position of the pumpingmember 400 is fixed in thepipette device 10, even when the pumpingmember 400 is pressed, the position of the pumpingmember 400 is not changed, and only a shape thereof may change. In addition, when the pumpingmember 400 is pressed, since a lower end portion of the pumpingmember 400 is not pushed downward, a degree of a change in the shape of the pumpingmember 400, when the pumpingmember 400 is pressed once, may be maintained at a constant level. As a result, when the pumpingmember 400 is pressed once, a volume of air delivered from the pumpingmember 400 into thecontainer 100 may be maintained at a constant level. - When a volume of air introduced into the
container 100 is maintained at a constant level if the pumpingmember 400 is pressed once, a pressure at a constant level may be applied into thecontainer 100 whenever the pumpingmember 400 is pressed. When a liquid is stored inside thecontainer 100, if the inside of thecontainer 100 is pressed, a volume of a liquid discharged through thenozzle 110 is proportional to the level of the pressure applied into thecontainer 100. In the present embodiment, whenever the pumpingmember 400 is pressed, since a pressure at a constant level is applied into thecontainer 100, a liquid of a constant volume may be discharged to the outside of thecontainer 100 through thenozzle 110 whenever the pumpingmember 400 is pressed. Therefore, without a separate scale, the user may discharge a liquid of a constant volume from thepipette device 10 by only pressing the pumpingmember 400. - In this case, when the pumping
member 400 is pressed once, a volume of a liquid discharged through thenozzle 110 may have a preset value. The preset value may be, for example, 1 mL. In this case, the pumpingmember 400 may be designed to have a size and a shape such that a liquid of the predetermined volume may be discharged when the pumpingmember 400 is pressed. - In addition, when the pumping
member 400 is firmly fixed in thepipette device 10, the position of the pumpingmember 400 may be maintained without change even if the pressure of outside air decreases. As a result, it is possible to prevent a gap between the pumpingmember 400 and thecontainer 100 from occurring in a reduced pressure environment, and it is possible to prevent the liquid inside thecontainer 100 from leaking through the gap. This effect is particularly useful when thepipette device 10 is transported by airplane. When thepipette device 10 of the present embodiment is transported by airplane, there is no leakage. As a result, it can be easily exported to other countries. - Referring again to
FIGS. 1 to 4 , thepipette device 10 may further include apressing plate 500 that is inserted between the second fixingmember 300 and the pumpingmember 400, and is mounted on an upper surface of the pumpingmember 400. Thepressing plate 500 may be a flat plate member having a shape corresponding to a cross section of the second fixingmember 300. Since thepressing plate 500 is provided on the upper surface of the pumpingmember 400, the user may press the pumpingmember 400 by pressing thepressing plate 500. - The pumping
member 400 is made of an elastic material. If there is a portion on which a pressure is particularly concentrated when the pumpingmember 400 is pressed, further deformation occurs in that portion. If the portion on which a pressure is concentrated is changed whenever the pumpingmember 400 is pressed, a shape into which the pumpingmember 400 changes may be different every time. In this case, as a result, an amount of a liquid discharged from thenozzle 110 may change every time. When the pumpingmember 400 is pressed, thepressing plate 500 may uniformly deliver a pressure to the upper surface of the pumpingmember 400. As a result, whenever the pumpingmember 400 is pressed, a shape into which the pumpingmember 400 changes may remain the same. As a result, whenever the pumpingmember 400 is pressed, an amount of a liquid discharged from thenozzle 110 may be further constantly maintained without error. -
FIG. 5 shows a side view illustrating thecontainer 100 inFIG. 3 and a partially enlarged view illustrating an enlarged lower portion of thecontainer 100. - Referring to
FIG. 5 , thepipette device 10 may further include acap 700 capable of opening and closing thenozzle 110. Thecap 700 may be connected to an end portion in which thenozzle 110 of thecontainer 100 is formed. When a part of thecap 700 is integrally formed with one end of thecontainer 100, thecap 700 may be connected to one end of thecontainer 100. In one end of thecontainer 100, a step portion may be formed along a circumference thereof. When thecap 700 is inserted into the step portion, thenozzle 110 may be closed. A portion connecting thecap 700 and thecontainer 100 may be bent. When thecap 700 is separated from one end of thecontainer 100, the connecting portion may be bent to open thenozzle 110. - The
cap 700 may include aninsertion protrusion 710 that protrudes from an inside surface. When thecap 700 is inserted into the step portion, theinsertion protrusion 710 may be inserted into thenozzle 110. According to the insertion of theinsertion protrusion 710 into thenozzle 110, thenozzle 110 may be firmly closed when thecap 700 is coupled. - According to the embodiment, an extending
portion 112 that extends upwardly from an upper end of thenozzle 110 of thecontainer 100 may be formed inside thecontainer 100. The extendingportion 112 may have a shape in which thenozzle 110 extends to thecontainer 100 having a predetermined length. That is, the extendingportion 112 may be formed in a cylindrical shape in which a hole is formed at the center. The hole may communicate with thenozzle 110. A diameter of the hole may be the same as an inner diameter of thenozzle 110. - When the extending
portion 112 that extends from the upper end of thenozzle 110 is formed inside thecontainer 100, the liquid stored inside thecontainer 100 should pass through an upper end of the extendingportion 112 to be introduced into thenozzle 110. However, when the extendingportion 112 having a circular cross section protrudes from a lower end surface of thecontainer 100, only an area corresponding to a circular upper end surface of the extendingportion 112 comes in contact with the liquid at an upper portion of thenozzle 110. In addition, there is air inside the hole of the extendingportion 112. As a result, an attractive force between the liquid and a surface of thecontainer 100 decreases at the upper portion of thenozzle 110. Accordingly, a phenomenon in which the liquid is introduced into thenozzle 110 when the inside of thecontainer 100 is not pressed, may be minimized. That is, by forming the extendingportion 112, even when a pressure is not applied into thecontainer 100, it is possible to prevent the liquid stored in thecontainer 100 from leaking through thenozzle 110. - According to another embodiment, an inner circumferential surface of the extending
portion 112 may include a plurality ofuneven portions 114. Here, when the plurality ofuneven portions 114 are formed, the inner circumferential surface of the extendingportion 112 may have a predetermined surface roughness. The surface roughness may have a predetermined value. The predetermined surface roughness value may be a value at which hydrophobicity of the inner circumferential surface of the extendingportion 112 increases. The predetermined surface roughness value may be changed by a material forming the extendingportion 112 or a type of a liquid to be stored inside thecontainer 100. The predetermined surface roughness value may be determined by an experiment. The plurality ofuneven portions 114 may have a uniform shape or a constant size, but the present invention is not limited thereto. - As an example, the extending
portion 112 may be formed at the same time when thenozzle 110 is formed. In this case, in order to form theuneven portion 114 in the inner circumferential surface of the extendingportion 112, a mold in which an uneven portion is formed in a surface may be used when the extendingportion 112 is formed. The mold may have a predetermined surface roughness, due to the uneven portion formed in the surface of the mold. In this case, the extendingportion 112 may be formed to have an inner circumferential surface that has the same surface roughness as the mold or a similar surface roughness to the mold. - When a plurality of
uneven portions 114 are formed on the inner circumferential surface of the extendingportion 112, the extendingportion 112 may be modified to have a hydrophobic inner surface. When the extendingportion 112 has the hydrophobic inner surface, an attractive force acting between an inside of the extendingportion 112 and the liquid stored in thecontainer 100 may be further decreased. As a result, it is possible to prevent the liquid stored in thecontainer 100 from leaking through thenozzle 110 when no pressure is applied into thecontainer 100. -
FIG. 6A is a side cross-sectional view illustrating the first fixingmember 200 inFIG. 3 .FIG. 6B is a plan view of the first fixingmember 200 when viewed from the top. - Referring to
FIGS. 6A and 6B , together withFIG. 3 , the first fixingmember 200 may include acylindrical body 210, thepartition wall 220 that protrudes inward from an inner circumferential surface of thebody 210 and divides an inside of thebody 210 into an upper portion and a lower portion, and acommunication hole 230 that passes through thepartition wall 220. - In an upper surface of the
partition wall 220, afirst support 2201 that protrudes upwardly along a circumference of thecommunication hole 230 and asecond support 2202 that has an outer diameter, which is smaller than that of thefirst support 2201, and protrudes upwardly from an upper surface of thefirst support 2201 along the circumference of thecommunication hole 230 may be formed. The outer diameter of thefirst support 2201 is greater than an inner diameter of the pumpingmember 400, and an outer diameter of thesecond support 2202 may be smaller than or the same as the inner diameter of the pumpingmember 400. - When the first fixing
member 200 and the second fixingmember 300 are coupled by interposing the pumpingmember 400 therebetween, the opened end portion of the pumpingmember 400 may be mounted on the upper surface of thefirst support 2201. Thefirst support 2201 supports the opened end portion of the pumpingmember 400 from below. When the pumpingmember 400 is pressed, the opened end portion of the pumpingmember 400 is caught by thefirst support 2201, and downward movement is restricted. As a result, a position of the opened end portion of the pumpingmember 400 may be fixed between the first fixingmember 200 and the second fixingmember 300. In addition, thesecond support 2202 may be inserted into the pumpingmember 400, and may firmly support a lower portion of the pumpingmember 400 from thereinside. - According to the embodiment, the upper surface of the
first support 2201 may be formed on a curved surface that is convex and faces upwardly. When the pumpingmember 400 is pressed, the pumpingmember 400 is vertically compressed, and a lower end portion of the pumpingmember 400 may be pushed outwardly. In this case, when the upper surface of thefirst support 2201 is formed on the curved surface that is convex and faces upwardly, it is possible to prevent the lower end portion of the pumpingmember 400 from being pushed outwardly. - Specifically, when the upper surface of the
first support 2201 has a convex curved surface shape, if the pumpingmember 400 is pressed, the outward movement of the lower end portion of the pumpingmember 400 may be restricted by bending of thefirst support 2201. That is, the end portion of the pumpingmember 400 is caught by bending of the upper surface of thefirst support 2201, and may not be pushed outwardly. - The
communication hole 230 may serve as a fluid passage connecting an inside of thecontainer 100 and an inside of the pumpingmember 400. Inside thecommunication hole 230, thestick fixing portion 250 into which thestick member 610 may be inserted and fixed may be provided. Thestick fixing portion 250 may be connected to the circumferential surface of thecommunication hole 230 by a plurality ofribs 240 such that thecommunication hole 230 may still serve as the fluid passage. When the pumpingmember 400 is pressed, internal air of the pumpingmember 400 may be delivered into thecontainer 100 through a space between theribs 240. - In a lower surface of the
partition wall 220, a circularthird support 2203 that protrudes downwardly from the outside of thecommunication hole 230 and a circularfourth support 2204 that protrudes downwardly from the outside of thethird support 2203 may be formed. Thethird support 2203 and thefourth support 2204 may be formed to be spaced from each other. A protrusion height of thefourth support 2204 may be greater than that of thethird support 2203. In addition, an outer diameter of thethird support 2203 may be smaller than or the same as an inner diameter of thecontainer 100. An inner diameter of thefourth support 2204 may be greater than that of thecontainer 100, and may be smaller than an outer diameter of thecontainer 100. - When the
container 100 and the first fixingmember 200 are coupled, thethird support 2203 of the first fixingmember 200 is inserted into thecontainer 100 through the opened end portion of thecontainer 100. In this case, thefourth support 2204 may come in contact with a surface of the end portion of thecontainer 100. - In the first fixing
member 200, in an upper portion of thepartition wall 220 among the inner circumferential surface of thebody 210, a plurality offirst fastening grooves 260 a that extend to a longitudinal direction of thebody 210 and are disposed to be spaced from each other and asecond fastening groove 260 b that extends along a circumference of thebody 210 may be formed. Thesecond fastening groove 260 b may be perpendicular to each of thefirst fastening grooves 260 a. Afirst fastening protrusion 360 a and asecond fastening protrusion 360 b of the second fixingmember 300 to be described may be inserted into thefirst fastening groove 260 a and thesecond fastening groove 260 b, respectively. When thefirst fastening protrusion 360 a is inserted into thefirst fastening groove 260 a and thesecond fastening protrusion 360 b is inserted into thesecond fastening groove 260 b, the first fixingmember 200 and the second fixingmember 300 may be coupled. -
FIG. 7A is a plan view of the second fixingmember 300 inFIG. 3 when viewed from the top.FIG. 7B is a perspective view of the second fixingmember 300 with a bottom surface facing upwardly. - Referring to
FIGS. 7A and 7B , together withFIG. 3 , the second fixingmember 300 may include acylindrical body 320 whose side surface is partially recessed from an upper end, the through-hole 310 that is formed by passing through thebody 320 and into which the pumpingmember 400 is inserted, and aprotrusion 330 that protrudes inward from an upper end of the inner circumferential surface of thebody 320. - The recessed portion of the
body 320 may have a width at which the user's thumb can be inserted. The user may push his or her thumb into the second fixingmember 300 through the recessed portion and press the pumpingmember 400. Theprotrusion 330 may be formed on a side opposite to the recessed portion of thebody 320. A fastening protrusion of thepressing plate 500 to be described may be caught in theprotrusion 330. While thepressing plate 500 is mounted on the upper surface of the pumpingmember 400, when the fastening protrusion of thepressing plate 500 is caught in theprotrusion 330, thepressing plate 500 may be inserted between the pumpingmember 400 and the second fixingmember 300. - Meanwhile, in the second fixing
member 300, in a lower portion of an outer circumferential surface of thebody 320, a plurality offirst fastening protrusions 360 a that extend to a longitudinal direction of thebody 320 and are disposed to be spaced from each other, and thesecond fastening protrusion 360 b that extends along a circumference of thebody 320 may be formed. Thesecond fastening protrusion 360 b may be perpendicular to each of thefirst fastening protrusions 360 a. As described above, when thefirst fastening protrusion 360 a is inserted into thefirst fastening groove 260 a and thesecond fastening protrusion 360 b is inserted into thesecond fastening groove 260 b, the first fixingmember 200 and the second fixingmember 300 may be coupled. - Coupling of the
first fastening groove 260 a and thefirst fastening protrusion 360 a may restrict rotation of the second fixingmember 300. Coupling of thesecond fastening groove 260 b and thesecond fastening protrusion 360 b may fix a position of the second fixingmember 300 in a longitudinal direction. - The plurality of
first fastening grooves 260 a may be disposed to have a constant interval therebetween. In order to correspond thereto, a plurality offirst fastening protrusions 360 a may be disposed to have the same interval therebetween. When a plurality offirst fastening grooves 260 a and the plurality offirst fastening protrusions 360 a are disposed to have the same interval therebetween, the second fixingmember 300 may be coupled to the first fixingmember 200, regardless of a direction in which the second fixingmember 300 faces. - Since a plurality of
first fastening grooves 260 a and a plurality offirst fastening protrusions 360 a are disposed to be spaced from each other, when each of thefirst fastening protrusions 360 a can be inserted into each of thefirst fastening grooves 260 a if the second fixingmember 300 faces in a specific direction, each of thefirst fastening protrusions 360 a can be inserted into each of thefirst fastening grooves 260 a again only when the second fixingmember 300 is rotated by a constant angle from that state. In addition, each of thefirst fastening protrusions 360 a can be inserted into each of thefirst fastening grooves 260 a only when the second fixingmember 300 rotates by the constant angle or additionally rotates a multiple of the constant angle in the same direction again. Therefore, when the user couples the first fixingmember 200 and the second fixingmember 300, or when the first fixingmember 200 and the second fixingmember 300 are coupled in a process of manufacturing thepipette device 10, constant angular intervals may be set in a direction in which the recessed portion of the second fixingmember 300 faces. - While the present embodiment has exemplified a case in which the first fixing
member 200 and the second fixingmember 300 are coupled using the pluralities of grooves and protrusions, the scope of the present invention is not limited thereto. Various coupling structures in which the first fixingmember 200 and the second fixingmember 300 may be coupled by interposing the lower end portion of the pumpingmember 400 therebetween may be used. -
FIG. 8 is a side cross-sectional view illustrating the pumpingmember 400 inFIG. 3 . - Referring to
FIG. 8 , together withFIG. 3 , the pumpingmember 400 may include apressing portion 430 having an empty space therein, acolumn portion 420 that extends to a longitudinal direction with a predetermined length from an end portion of thepressing portion 430, and aflange portion 410 that protrudes perpendicular to thecolumn portion 420 from an end portion of thecolumn portion 420 along a circumference of thecolumn portion 420. - The
pressing portion 430 may include an upper surface that has a flat pocket shape. When the flat upper surface is pressed by the user, the shape may be changed by compression. In a lower end of thepressing portion 430, a circular opening may be formed. Thecolumn portion 420 may extend along a circumference of the circular opening and protrude to a longitudinal direction with a predetermined length. In a lower end of thecolumn portion 420, theflange portion 410 may be formed in an outward direction. When the first fixingmember 200 and the second fixingmember 300 are coupled, while thecolumn portion 420 is inserted into the second fixingmember 300, theflange portion 410 may be inserted between the first fixingmember 200 and the second fixingmember 300. When theflange portion 410 is inserted between the first fixingmember 200 and the second fixingmember 300, the position of the pumpingmember 400 may be fixed. - According to the embodiment of the present invention, a thickness t1 of the
pressing portion 430 may be greater than a thickness t2 of thecolumn portion 420. In this case, when the user presses an upper surface of thepressing portion 430, a relatively great change may occur in a portion whose thickness is changed, that is, in a boundary between thepressing portion 430 and thecolumn portion 420. As a result, the boundary between thepressing portion 430 and thecolumn portion 420 may be intensively compressed, and the user may feel a clicking sensation, upon pressing thepressing portion 430. The user presses the pumpingmember 400 until he or she feels the clicking sensation. When he or she feels the clicking sensation, the pressing operation may be completed. Therefore, usability may be improved. -
FIG. 9A is a side view illustrating thepressing plate 500 inFIG. 3 . -
FIG. 9B is a perspective view of thepressing plate 500 with a bottom surface facing upwardly. - Referring to
FIGS. 9A and 9B , together withFIG. 3 , thepressing plate 500 may include abody 520 having a flat upper surface, acircular groove 510 formed on a lower surface of thebody 520, and afitting protrusion 530 that protrudes outwardly from an outer circumferential surface of thebody 520. - The
body 520 may have a flat upper surface and a shape corresponding to a cross section of an upper portion of the second fixingmember 300. A diameter of thecircular groove 510 may be greater than that of the upper surface of the pumpingmember 400. In thecircular groove 510, while the pumpingmember 400 is inserted, thepressing plate 500 may be mounted on the upper surface of the pumpingmember 400. When thepressing plate 500 is mounted, thefitting protrusion 530 may be positioned below theprotrusion 330 of the second fixingmember 300. When thefitting protrusion 530 is caught by theprotrusion 330, the upward movement of thepressing plate 500 is restricted. When the pumpingmember 400 is inserted into thecircular groove 510, the downward movement and lateral movement of thepressing plate 500 may be restricted. -
FIG. 10 is a diagram illustrating an enlarged area A in the cross-sectional view inFIG. 2 .FIG. 11 is a diagram illustrating a state of the area A when the pumpingmember 400 is pressed as inFIG. 4 . - Referring to
FIG. 10 , it illustrates a state in which thecontainer 100, the first fixingmember 200, the pumpingmember 400 and the second fixingmember 300 are coupled. Thefirst fixing member 200 and the second fixingmember 300 may be coupled by interposing the lower end portion of the pumpingmember 400 therebetween. Thecontainer 100 may be coupled to the first fixingmember 200. - When the
container 100 and the first fixingmember 200 are coupled, thethird support 2203 of the first fixingmember 200 is inserted into thecontainer 100 through the opened end portion of thecontainer 100. In this case, thefourth support 2204 may come in contact with a surface of the end portion of thecontainer 100. As described above, when thethird support 2203 and thefourth support 2204 are disposed to be spaced from each other, a predetermined empty space (S) surrounded by thethird support 2203, thefourth support 2204 and the end portion of thecontainer 100 may be formed. - When the
container 100 and the first fixingmember 200 are coupled, thethird support 2203 is inserted into thecontainer 100 and accordingly a position of thecontainer 100 may be fixed. Moreover, thethird support 2203 serves as a primary barrier between the internal space of thecontainer 100 and outside air, and thefourth support 2204 serves as a secondary barrier between the internal space of thecontainer 100 and outside air. When thethird support 2203 primarily blocks the internal space of thecontainer 100 from outside air and thefourth support 2204 is provided as a secondary block, a phenomenon in which a liquid stored inside thecontainer 100 evaporates, due to temperature and humidity differences between the internal space of thecontainer 100 and outside air, may be minimized. - In addition, an air layer may be formed in the empty space (S) between the
fourth support 2204 and thethird support 2203. The air layer formed in the empty space (S) serves as an insulation layer, and therefore the phenomenon in which a liquid stored inside thecontainer 100 evaporates may be prevented even more efficiently. - Referring to
FIG. 11 , when the pumpingmember 400 is pressed, a shape of the pumpingmember 400 may be changed and compressed. When the pumpingmember 400 is compressed, an internal space of the pumpingmember 400 decreases, and accordingly internal air of the pumpingmember 400 is discharged to the outside of the pumpingmember 400. As indicated by an arrow inFIG. 11 , air discharged from the pumpingmember 400 may pass through thecommunication hole 230 of the first fixingmember 200, and may be introduced into thecontainer 100. In proportion to an amount of the introduced air, an interior pressure of thecontainer 100 increases. Due to the increased pressure, the liquid inside thecontainer 100 may be discharged to the outside through thenozzle 110. - Since the lower end portion of the pumping
member 400 is firmly fixed between the first fixing device and the second fixing device, when the pumpingmember 400 is pressed, the lower end portion of the pumpingmember 400 is not pushed downwardly, and only the shape of the pumpingmember 400 may be changed. Thepressing plate 500 mounted on the upper surface of the pumpingmember 400 may uniformly deliver a force with which the user presses to the upper surface of the pumpingmember 400. - In addition, as described above, when the
first support 2201 is formed on a curved surface that is convex and faces upwardly, bending of thefirst support 2201 may prevent the lower end portion of the pumpingmember 400 from being pushed outwardly when the pumpingmember 400 is compressed. In addition, when the pumpingmember 400 is compressed, the lower end portion of the pumpingmember 400 may be changed to have a shape combined with the upper surface of thefirst support 2201. As a result, the lower end portion of the pumpingmember 400 may come in close contact with the upper surface of thefirst support 2201, and when the shape of the pumpingmember 400 is changed, internal air of the pumpingmember 400 may be prevented from leaking through a gap between the lower end portion of the pumpingmember 400 and thefirst support 2201. - As described above, when the pumping
member 400 is pressed, the position of the pumpingmember 400 is fixed, and a force is uniformly delivered to the upper surface of the pumpingmember 400 by thepressing plate 500. When the pumpingmember 400 is compressed, internal air of the pumpingmember 400 is prevented from leaking downward at the lower end portion of the pumpingmember 400. Therefore, a volume of air delivered from the pumpingmember 400 into thecontainer 100 when the pumpingmember 400 is pressed once may be constantly maintained. Therefore, a volume of a liquid discharged from thenozzle 110 of thecontainer 100 when the pumpingmember 400 is pressed once may be constantly maintained every time. - The above effect may be understood when the following Table 1 and Table 2 are compared. As shown in Table 1, an amount of a discharged liquid is recorded using the
pipette device 10 in the related art in which the user should adjust an amount of a liquid to be discharged, while viewing a scale displayed in thecontainer 100. As shown in Table 2, an amount of a liquid discharged when the pumpingmember 400 is pressed in thepipette device 10 of the present embodiment is recorded. As shown in Table 1, a liquid by a scale corresponding to a volume of 1 mL is discharged once using thepipette device 10 in the related art. As shown in Table 2, thepipette device 10 used in the experiment was designed such that a liquid corresponding to a volume of 1 mL is discharged when the pumpingmember 400 is pressed once. As shown in each Table, columns represent each experiment and rows represent a first discharge, a second discharge and a third discharge in each experiment. -
TABLE 1 Standard First Second Third Fourth Fifth Sixth Seventh Eighth Ninth Average deviation First 0.956 1.12 0.95 1.03 1.09 1.15 0.96 1.04 1.14 1.05 0.08 discharge Second 1.01 0.96 1.12 1.01 1.06 1.06 0.95 1.05 1.06 1.03 0.05 discharge Third 1.11 0.95 1.03 1.05 1.05 0.07 0.95 0.95 1.01 0.91 0.32 discharge Average 1.03 1.01 1.03 1.03 1.07 0.76 0.95 1.01 1.07 Standard 0.08 0.1 0.09 0.02 0.02 0.6 0.01 0.06 0.07 deviation -
TABLE 2 Standard First Second Third Fourth Fifth Sixth Seventh Eighth Ninth Average deviation First 0.98 0.99 1.01 0.99 1.01 0.99 1 1.01 1.01 1 0.01 discharge Second 1 1.03 1.02 1 1.02 1.01 0.99 1.04 1.01 1.01 0.02 discharge Third 0.97 1.08 1.03 1.02 1.04 0.99 1.01 1.02 1 1.02 0.03 discharge Average 0.98 1.03 1.02 1 1.02 1 1 1.02 1.01 Standard 0.02 0.05 0.01 0.02 0.02 0.01 0.01 0.02 0.01 deviation - When Table 1 and Table 2 are compared, it can be understood that a volume of a measured liquid in Table 2 is significantly close to 1 mL. In particular, as shown in Table 2, an average value of volumes of discharged liquids in each experiment and an average value of volumes of discharged liquids in first to third discharges of all experiments are significantly closer to 1 mL than those in Table 1. In addition, standard deviations calculated in Table 2 are significantly lower than those in Table 1. This means that, when the pipette device according to the present embodiment is used, errors in which a discharged liquid is not 1 mL every time are significantly decreased. That is, as shown in the experiment results, when the pipette device according to the present embodiment is used, it can be understood that an accurate amount of liquid may be uniformly discharged.
- Meanwhile, when the
first support 2201 is formed in a curved surface that is convex and faces upwardly and the pumpingmember 400 is compressed, if the lower end portion of the pumpingmember 400 is changed to have a shape combined with the upper surface of thefirst support 2201, a liquid leaked outside thecontainer 100 may be blocked between theflange portion 410 and thefirst support 2201. - As a result, leakage of the liquid inside the
container 100 may be prevented more efficiently. -
FIG. 12 is a diagram illustrating a state in which thestick member 610 and the collectingtip 620 included in thepipette device 10 inFIG. 1 are maintained. - Referring to
FIG. 12 , when the first fixingmember 200 and the second fixingmember 300 are coupled, the center of gravity of a structure in which thecollecting tip 620, thestick member 610, the first fixingmember 200 and the second fixingmember 300 are coupled may be positioned on the first fixingmember 200 or the second fixingmember 300. In this case, since the center of gravity is positioned on the first fixingmember 200 or the second fixingmember 300, the collectingtip 620 may not come in contact with a floor surface when the collectingtip 620 is maintained as inFIG. 12 . Since the collectingtip 620 may be maintained out of contact with the floor surface, it is possible to prevent thecollecting tip 620 from being contaminated, and is also possible to improve reliability of sample collection. -
FIG. 13A is a diagram illustrating another embodiment of the collecting tip included in thepipette device 10 of the present invention.FIG. 13B is a diagram schematically illustrating a state in which acollecting tip 620 a inFIG. 13A is manufactured. - According to the present embodiment, the collecting
tip 620 a may be made of a polyurethane foam having a predetermined pore size. Specifically, as illustrated inFIG. 13A , the collectingtip 620 a may be made of a polyurethane foam sheet PS. In this case, the collectingtip 620 a may be formed in a shape in which the polyurethane foam sheet PS is bent by interposing thestick member 610 therebetween, and then edges of the polyurethane foam sheet PS overlapping at both sides of thestick member 610 are bonded. The edge of the collectingtip 620 a may be formed in a straight line or a curved line. - The pore size of the polyurethane foam sheet PS may be from 60 pores per inch (ppi) or more to 100 ppi or less. When the collecting
tip 620 a is made of the polyurethane foam sheet PS having the pore size of the value range, sample collecting performance may be improved. Specifically, since the polyurethane foam sheet PS having the pore size of said range is denser than common cotton, a phenomenon in which a sample attached to the collectingtip 620 a is absorbed into the collectingtip 620 a may be minimized. As a result, the sample attached to the collectingtip 620 a may be separated from the collectingtip 620 a more easily, and recovery efficiency of the sample may be improved. - Referring to (1) and (2) in
FIG. 13B , in order to manufacture the collectingtip 620 a according to the above-described embodiment, first, the polyurethane foam sheet PS having the preset pore size may be manufactured. The polyurethane foam sheet PS may be bent by interposing thestick member 610 therebetween. While the polyurethane foam sheet PS is folded in half, the polyurethane foam sheet PS that overlaps at both sides of thestick member 610 may be bonded along a line (L) of a predetermined shape. The polyurethane foam sheet PS may be bonded by heat treatment. After the doubled polyurethane foam sheet PS is bonded, the polyurethane foam sheet PS is cut and a shape of the collectingtip 620 a may be formed. In addition, an end portion of the polyurethane foam sheet PS and thestick member 610 may be bonded. The polyurethane sheet (PS) and thestick member 610 may be bonded by heat treatment. - When the collecting
tip 620 a is manufactured, the overlapped polyurethane foam sheet PS is bonded at both sides of thestick member 610, and the end portion of the polyurethane foam sheet PS may be bonded to thestick member 610 at the same time. In addition, the line (L) at which the overlapped polyurethane foam sheet PS is bonded may be the same as a boundary shape of the collectingtip 620 a. - In this case, the polyurethane foam sheet PS may be cut along the line (L) at which the PS is bonded and form a shape of the collecting
tip 620 a. - Embodiments of the present invention are listed below.
- Item 1 is a pipette device, including: a container having a predetermined space therein, in one end of which a nozzle is formed and the other end of which is opened; a first fixing member whose one end is detachably coupled to the other end of the container; a second fixing member coupled to the other end of the first fixing member; and a pumping member that is inserted into the second fixing member such that an opened end portion faces the other end of the container, delivers internal air into the container by changing in shape when it is pressed, and presses an internal space of the container, wherein the opened end portion of the pumping member is fixed between the first fixing member and the second fixing member by coupling of the first fixing member and the second fixing member.
- Item 2 is the pipette device of item 1, further including a cap that is connected to the one end of the container, and is able to open and close the nozzle.
- Item 3 is the pipette device of items 1 and 2, wherein the cap includes an insertion protrusion that protrudes from an inside surface, and is able to be inserted into the nozzle when the cap is closed.
- Item 4 is the pipette device of items 1 to 3, wherein the container further includes an extending portion that extends from an upper end of the nozzle into the container with a predetermined length.
- Item 5 is the pipette device of items 1 to 4, wherein an inner circumferential surface of the extending portion includes a plurality of uneven portions representing a surface roughness of a preset value.
- Item 6 is the pipette device of items 1 to 5, wherein the first fixing member includes: a cylindrical body; a partition wall that protrudes inward from an inner circumferential surface of the body and divides an inside of the body into an upper portion and a lower portion; and a communication hole that passes through the partition wall, and wherein the communication hole connects an internal space of the container and an inside of the pumping member.
- Item 7 is the pipette device of items 1 to 6, wherein, in an upper surface of the partition wall, a first support that protrudes upwardly along a circumference of the communication hole and comes in contact with a lower end of the pumping member when an upper surface thereof is coupled to the first fixing member and the second fixing member, and a second support that protrudes upwardly from the upper surface of the first support along a circumference of the communication hole and is inserted into the pumping member when the first fixing member and the second fixing member are coupled, are formed, and wherein the second support has a smaller outer diameter than the first support.
- Item 8 is the pipette device of items 1 to 7, wherein the upper surface of the first support is formed in a curved surface that is convex and faces upwardly.
- Item 9 is the pipette device of items 1 to 8, wherein, in a lower surface of the partition wall, a circular third support that protrudes downwardly from the outside of the communication hole and is inserted into the container when the container and the first fixing member are coupled and a circular fourth support that protrudes downwardly from the outside of the third support and has a lower surface that comes in contact with an upper end of the container, are formed, and wherein the third support and the fourth support are spaced from each other.
-
Item 10 is the pipette device of items 1 to 9, wherein, in the first fixing member, a collecting tip is formed in an end portion, and a stick member that is accommodated inside the container when the first fixing member is coupled to the container is fixed. - Item 11 is the pipette device of items 1 to 10, wherein the first fixing member further includes: a stick fixing portion provided inside the communication hole; and a plurality of ribs that connect a circumferential surface of the communication hole and the stick fixing portion, and wherein the stick member is inserted into and fixed to the stick fixing portion.
- Item 12 is the pipette device of items 1 to 11, wherein the collecting tip is made of a polyurethane.
- Item 13 is the pipette device of items 1 to 12, wherein the collecting tip is made of a polyurethane foam sheet having a pore size of a predetermined value.
- Item 14 is the pipette device of items 1 to 13, wherein the pore size of the preset value is from 60 pores per inch (ppi) or more to 100 ppi or less.
- Item 15 is the pipette device of items 1 to 14, wherein, when the first fixing member and the second fixing member are coupled, the center of gravity of a structure in which the collecting tip, the stick member, the first fixing member and the second fixing member are coupled is positioned on the first fixing member or the second fixing member.
- Item 16 is the pipette device of items 1 to 15, wherein the second fixing member includes: a cylindrical body whose side surface is partially recessed from an upper end; a through-hole that is formed by passing through the body and into which the pumping member is inserted; and a protrusion that protrudes inward from an upper end of an inner circumferential surface of the body.
- Item 17 is the pipette device of items 1 to 16, further including a pressing plate that has a side surface from which a fitting protrusion protrudes and a lower surface having a circular groove formed thereon, wherein the pressing plate is inserted between the pumping member and the second fixing member when the fitting protrusion is positioned below the protrusion while an upper end of the pumping member is inserted into the circular groove.
- Item 18 is the pipette device of items 1 to 17, wherein the first fixing member includes a plurality of first fastening grooves that extend in a longitudinal direction and are disposed to have constant interval therebetween and a second fastening groove that extends along a circumference of an inside surface to be perpendicular to the first fastening groove, wherein the second fixing member includes a plurality of first fastening protrusions that extend in a longitudinal direction and are disposed to have the constant interval therebetween and a second fastening protrusion that extends along a circumference of an outside surface to be perpendicular to the first fastening protrusion, and wherein the first fixing member and the second fixing member are coupled when each of the first fastening protrusions is inserted into each of the first fastening grooves and the second fastening protrusion is inserted into the second fastening groove, respectively.
- Item 19 is the pipette device of items 1 to 18, wherein the pumping member is made of silicone or rubber.
- Item 20 is the pipette device of items 1 to 19, wherein the pumping member includes: a pressing portion that has an empty space therein and an upper portion that is formed to be flat; a column portion that extends to a longitudinal direction from an end portion of the pressing portion with a predetermined length; and a flange portion that protrudes perpendicular to the column portion along a circumference of the column portion from an end portion of the column portion, and wherein the pressing portion has a greater thickness than the column portion.
- Item 21 is the pipette device of items 1 to 20, further including a pressing plate that is inserted between the second fixing member and the pumping member and mounted on an upper surface of the pumping member.
- While detailed embodiments of the pipette device and the manufacturing method according to the present invention have been described above, these are only examples, and the present invention is not limited thereto, but may be interpreted to have the widest scope according to the basic idea disclosed in this specification. Those skilled in the art may implement patterns of shapes that are not indicated by combining and replacing the disclosed embodiments within a range, not departing from the scope of the present invention. In addition, those skilled in the art may easily change and modify the disclosed embodiments based on this specification, and it will be apparent that such changes or modifications are within the scope of the present invention.
-
List of Reference Numerals 10: pipette device 100: container 110: nozzle 112: extending portion 114: uneven portion 120: thread of container 200: first fixing member 210: body of first fixing member 220: partition wall 230: communication hole 240: rib 250: stick fixing portion 260a: first fastening groove 260b: second fastening groove 290: thread of first fixing member 2201: first support 2202: second support 2203: third support 2204: fourth support 300: second fixing member 310: through-hole 320: body of second fixing member 330: protrusion 360a: first fastening protrusion 360b: second fastening protrusion 400: pumping member 410: flange portion 420: column portion 430: pressing portion t1: thickness of pressing portion t2: thickness of column portion 500: pressing plate 510: round hole 520: body of pressing plate 530: fitting protrusion 610: stick member 620, 620a: collecting tip PS: polyurethane foam sheet 700: cap 710: insertion protrusion
Claims (21)
Applications Claiming Priority (3)
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KR1020140040365A KR20150115391A (en) | 2014-04-04 | 2014-04-04 | Pipetting device |
KR10-2014-0040365 | 2014-04-04 | ||
PCT/US2015/023608 WO2015153623A1 (en) | 2014-04-04 | 2015-03-31 | Pipette device |
Publications (2)
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US20170021347A1 true US20170021347A1 (en) | 2017-01-26 |
US10661266B2 US10661266B2 (en) | 2020-05-26 |
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US15/300,731 Active 2035-11-25 US10661266B2 (en) | 2014-04-04 | 2015-03-31 | Pipette device |
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US (1) | US10661266B2 (en) |
EP (1) | EP3126051B1 (en) |
JP (1) | JP6297167B2 (en) |
KR (2) | KR20150115391A (en) |
CN (1) | CN106170341B (en) |
BR (1) | BR112016022959B1 (en) |
WO (1) | WO2015153623A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
EP3126051B1 (en) | 2019-05-08 |
KR20150115391A (en) | 2015-10-14 |
CN106170341A (en) | 2016-11-30 |
JP6297167B2 (en) | 2018-03-20 |
CN106170341B (en) | 2017-12-12 |
BR112016022959A2 (en) | 2017-08-15 |
JP2017511251A (en) | 2017-04-20 |
EP3126051A1 (en) | 2017-02-08 |
US10661266B2 (en) | 2020-05-26 |
KR20160140930A (en) | 2016-12-07 |
EP3126051A4 (en) | 2017-09-06 |
BR112016022959B1 (en) | 2021-09-28 |
WO2015153623A1 (en) | 2015-10-08 |
KR102438600B1 (en) | 2022-08-31 |
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